Has anyone been fortunate enough to have been offered both long and short haul when called? For example 320 LGW or 777
Not sure if that happens, be interesting to know.
Anyhow while we wait for an answer - I assume you realise that by accepting the 777 position you are not locking yourself out of shorthaul and/or LGW forever?
As it stands at the moment you could join on Longhaul, learn about the reality of the “BA way” from the inside, and then at the end of you engagement freeze if you still really desire a LGW 320 position you could bid to move, probably direct into the Left seat by way of a command conversion.